Revealing correct answer after student uses text on sketch tool

I am trying to use an action button where if the student either draws or uses the text on the sketch tool, the answer reveals itself. So far I can only get the answer to appear if they draw on the sketch. Is there anyway to code it for this to work? Below is the code I have tried so far:

hidden: when (choice1.isSelected(1)) and button1.timeSincePress>0 and sketch1.sketch.totalStrokeLength>0 or sketch1.sketch.pointCount>0 false otherwise true

If that ability exists, it doesn’t appear to be in the documentation yet:

Sketch Object Documentation

I can confirm. No sinks or sources for text in sketch yet.